scolecodont
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scolecodont — sco·le·co·dont … English syllables
Scolecodonts — A scolecodont is the jaw of a polychaete annelid, a common type of fossil producing segmented worm useful in invertebrate paleontology. Scolecodonts are common and diverse microfossils, which range from the Cambrian period (around half a billion… … Wikipedia